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diff --git a/vcl/source/filter/iras/iras.cxx b/vcl/source/filter/iras/iras.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <vcl/graph.hxx>
+#include <vcl/BitmapTools.hxx>
+#include <sal/log.hxx>
+#include <tools/stream.hxx>
+#include <filter/RasReader.hxx>
+
+class FilterConfigItem;
+
+#define RAS_TYPE_OLD 0x00000000 // supported formats by this filter
+#define RAS_TYPE_STANDARD 0x00000001
+#define RAS_TYPE_BYTE_ENCODED 0x00000002
+#define RAS_TYPE_RGB_FORMAT 0x00000003
+
+#define RAS_COLOR_NO_MAP 0x00000000
+#define RAS_COLOR_RGB_MAP 0x00000001
+#define RAS_COLOR_RAW_MAP 0x00000002
+
+#define SUNRASTER_MAGICNUMBER 0x59a66a95
+
+//============================ RASReader ==================================
+
+namespace {
+
+class RASReader {
+
+private:
+
+ SvStream& m_rRAS; // the RAS file to be read in
+
+ bool mbStatus;
+ sal_Int32 mnWidth, mnHeight; // image dimensions in pixels
+ sal_uInt16 mnDstBitsPerPix;
+ sal_uInt16 mnDstColors;
+ sal_Int32 mnDepth, mnImageDatSize, mnType;
+ sal_Int32 mnColorMapType, mnColorMapSize;
+ sal_uInt8 mnRepCount, mnRepVal; // RLE Decoding
+
+ bool ImplReadBody(vcl::bitmap::RawBitmap&, std::vector<Color> const & rvPalette);
+ bool ImplReadHeader();
+ sal_uInt8 ImplGetByte();
+
+public:
+ explicit RASReader(SvStream &rRAS);
+ bool ReadRAS(Graphic & rGraphic);
+};
+
+}
+
+//=================== Methods of RASReader ==============================
+
+RASReader::RASReader(SvStream &rRAS)
+ : m_rRAS(rRAS)
+ , mbStatus(true)
+ , mnWidth(0)
+ , mnHeight(0)
+ , mnDstBitsPerPix(0)
+ , mnDstColors(0)
+ , mnDepth(0)
+ , mnImageDatSize(0)
+ , mnType(0)
+ , mnColorMapType(0)
+ , mnColorMapSize(0)
+ , mnRepCount(0)
+ , mnRepVal(0)
+{
+}
+
+bool RASReader::ReadRAS(Graphic & rGraphic)
+{
+ sal_uInt32 nMagicNumber;
+
+ if ( m_rRAS.GetError() )
+ return false;
+
+ m_rRAS.SetEndian( SvStreamEndian::BIG );
+ m_rRAS.ReadUInt32( nMagicNumber );
+ if (!m_rRAS.good() || nMagicNumber != SUNRASTER_MAGICNUMBER)
+ return false;
+
+ // Kopf einlesen:
+
+ mbStatus = ImplReadHeader();
+ if ( !mbStatus )
+ return false;
+
+ std::vector<Color> aPalette;
+ bool bOk = true;
+
+ if ( mnDstBitsPerPix <= 8 ) // pallets pictures
+ {
+ bool bPalette(false);
+
+ if ( mnColorMapType == RAS_COLOR_RAW_MAP ) // RAW color map is skipped
+ {
+ sal_uInt64 nCurPos = m_rRAS.Tell();
+ bOk = checkSeek(m_rRAS, nCurPos + mnColorMapSize);
+ }
+ else if ( mnColorMapType == RAS_COLOR_RGB_MAP ) // we can read out the RGB
+ {
+ mnDstColors = static_cast<sal_uInt16>( mnColorMapSize / 3 );
+
+ if ( ( 1 << mnDstBitsPerPix ) < mnDstColors )
+ return false;
+
+ if ( ( mnDstColors >= 2 ) && ( ( mnColorMapSize % 3 ) == 0 ) )
+ {
+ aPalette.resize(mnDstColors);
+ sal_uInt16 i;
+ sal_uInt8 nRed[256], nGreen[256], nBlue[256];
+ for ( i = 0; i < mnDstColors; i++ ) m_rRAS.ReadUChar( nRed[ i ] );
+ for ( i = 0; i < mnDstColors; i++ ) m_rRAS.ReadUChar( nGreen[ i ] );
+ for ( i = 0; i < mnDstColors; i++ ) m_rRAS.ReadUChar( nBlue[ i ] );
+ for ( i = 0; i < mnDstColors; i++ )
+ {
+ aPalette[i] = Color(nRed[ i ], nGreen[ i ], nBlue[ i ]);
+ }
+ bPalette = true;
+ }
+ else
+ return false;
+
+ }
+ else if ( mnColorMapType != RAS_COLOR_NO_MAP ) // everything else is not standard
+ return false;
+
+ if (!bPalette)
+ {
+ mnDstColors = 1 << mnDstBitsPerPix;
+ aPalette.resize(mnDstColors);
+ for ( sal_uInt16 i = 0; i < mnDstColors; i++ )
+ {
+ sal_uInt8 nCount = 255 - ( 255 * i / ( mnDstColors - 1 ) );
+ aPalette[i] = Color(nCount, nCount, nCount);
+ }
+ }
+ }
+ else
+ {
+ if ( mnColorMapType != RAS_COLOR_NO_MAP ) // when graphic has more than 256 colors and a color map we skip
+ { // the colormap
+ sal_uInt64 nCurPos = m_rRAS.Tell();
+ bOk = checkSeek(m_rRAS, nCurPos + mnColorMapSize);
+ }
+ }
+
+ if (!bOk)
+ return false;
+
+ //The RLE packets are typically three bytes in size:
+ //The first byte is a Flag Value indicating the type of RLE packet.
+ //The second byte is the Run Count.
+ //The third byte is the Run Value.
+ //
+ //for the sake of simplicity we'll assume that RAS_TYPE_BYTE_ENCODED can
+ //describe data 255 times larger than the data stored
+ size_t nMaxCompression = mnType != RAS_TYPE_BYTE_ENCODED ? 1 : 255;
+ sal_Int32 nBitSize;
+ if (o3tl::checked_multiply<sal_Int32>(mnWidth, mnHeight, nBitSize) || o3tl::checked_multiply<sal_Int32>(nBitSize, mnDepth, nBitSize))
+ return false;
+ if (m_rRAS.remainingSize() * nMaxCompression < static_cast<sal_uInt32>(nBitSize) / 8)
+ return false;
+
+ vcl::bitmap::RawBitmap aBmp(Size(mnWidth, mnHeight), 24);
+
+ // read in the bitmap data
+ mbStatus = ImplReadBody(aBmp, aPalette);
+
+ if ( mbStatus )
+ rGraphic = vcl::bitmap::CreateFromData(std::move(aBmp));
+
+ return mbStatus;
+}
+
+bool RASReader::ImplReadHeader()
+{
+ m_rRAS.ReadInt32(mnWidth).ReadInt32(mnHeight).ReadInt32(mnDepth).ReadInt32(mnImageDatSize).ReadInt32(mnType).ReadInt32(mnColorMapType).ReadInt32(mnColorMapSize);
+
+ if (!m_rRAS.good() || mnWidth <= 0 || mnHeight <= 0 || mnImageDatSize <= 0)
+ mbStatus = false;
+
+ switch ( mnDepth )
+ {
+ case 24 :
+ case 8 :
+ case 1 :
+ mnDstBitsPerPix = static_cast<sal_uInt16>(mnDepth);
+ break;
+ case 32 :
+ mnDstBitsPerPix = 24;
+ break;
+
+ default :
+ mbStatus = false;
+ }
+
+ switch ( mnType )
+ {
+ case RAS_TYPE_OLD :
+ case RAS_TYPE_STANDARD :
+ case RAS_TYPE_RGB_FORMAT :
+ case RAS_TYPE_BYTE_ENCODED : // this type will be supported later
+ break;
+
+ default:
+ mbStatus = false;
+ }
+ return mbStatus;
+}
+
+namespace
+{
+ const Color& SanitizePaletteIndex(std::vector<Color> const & rvPalette, sal_uInt8 nIndex)
+ {
+ if (nIndex >= rvPalette.size())
+ {
+ auto nSanitizedIndex = nIndex % rvPalette.size();
+ SAL_WARN_IF(nIndex != nSanitizedIndex, "filter.ras", "invalid colormap index: "
+ << static_cast<unsigned int>(nIndex) << ", colormap len is: "
+ << rvPalette.size());
+ nIndex = nSanitizedIndex;
+ }
+ return rvPalette[nIndex];
+ }
+}
+
+bool RASReader::ImplReadBody(vcl::bitmap::RawBitmap& rBitmap, std::vector<Color> const & rvPalette)
+{
+ sal_Int32 x, y;
+ sal_uInt8 nRed, nGreen, nBlue;
+ switch ( mnDstBitsPerPix )
+ {
+ case 1 :
+ {
+ sal_uInt8 nDat = 0;
+ for (y = 0; y < mnHeight && mbStatus; ++y)
+ {
+ for (x = 0; x < mnWidth && mbStatus; ++x)
+ {
+ if (!(x & 7))
+ {
+ nDat = ImplGetByte();
+ if (!m_rRAS.good())
+ mbStatus = false;
+ }
+ rBitmap.SetPixel(y, x, SanitizePaletteIndex(rvPalette,
+ sal::static_int_cast< sal_uInt8 >(
+ nDat >> ( ( x & 7 ) ^ 7 ))));
+ }
+ if (!( ( x - 1 ) & 0x8 ) )
+ {
+ ImplGetByte(); // WORD ALIGNMENT ???
+ if (!m_rRAS.good())
+ mbStatus = false;
+ }
+ }
+ break;
+ }
+
+ case 8 :
+ for (y = 0; y < mnHeight && mbStatus; ++y)
+ {
+ for (x = 0; x < mnWidth && mbStatus; ++x)
+ {
+ sal_uInt8 nDat = ImplGetByte();
+ rBitmap.SetPixel(y, x, SanitizePaletteIndex(rvPalette, nDat));
+ if (!m_rRAS.good())
+ mbStatus = false;
+ }
+ if ( x & 1 )
+ {
+ ImplGetByte(); // WORD ALIGNMENT ???
+ if (!m_rRAS.good())
+ mbStatus = false;
+ }
+ }
+ break;
+
+ case 24 :
+ switch ( mnDepth )
+ {
+
+ case 24 :
+ for (y = 0; y < mnHeight && mbStatus; ++y)
+ {
+ for (x = 0; x < mnWidth && mbStatus; ++x)
+ {
+ if ( mnType == RAS_TYPE_RGB_FORMAT )
+ {
+ nRed = ImplGetByte();
+ nGreen = ImplGetByte();
+ nBlue = ImplGetByte();
+ }
+ else
+ {
+ nBlue = ImplGetByte();
+ nGreen = ImplGetByte();
+ nRed = ImplGetByte();
+ }
+ rBitmap.SetPixel(y, x, Color(nRed, nGreen, nBlue));
+ if (!m_rRAS.good())
+ mbStatus = false;
+ }
+ if ( x & 1 )
+ {
+ ImplGetByte(); // WORD ALIGNMENT ???
+ if (!m_rRAS.good())
+ mbStatus = false;
+ }
+ }
+ break;
+
+ case 32 :
+ for (y = 0; y < mnHeight && mbStatus; ++y)
+ {
+ for (x = 0; x < mnWidth && mbStatus; ++x)
+ {
+ ImplGetByte(); // pad byte > nil
+ if ( mnType == RAS_TYPE_RGB_FORMAT )
+ {
+ nRed = ImplGetByte();
+ nGreen = ImplGetByte();
+ nBlue = ImplGetByte();
+ }
+ else
+ {
+ nBlue = ImplGetByte();
+ nGreen = ImplGetByte();
+ nRed = ImplGetByte();
+ }
+ rBitmap.SetPixel(y, x, Color(nRed, nGreen, nBlue));
+ if (!m_rRAS.good())
+ mbStatus = false;
+ }
+ }
+ break;
+ }
+ break;
+
+ default:
+ mbStatus = false;
+ break;
+ }
+ return mbStatus;
+}
+
+sal_uInt8 RASReader::ImplGetByte()
+{
+ sal_uInt8 nRetVal(0);
+ if ( mnType != RAS_TYPE_BYTE_ENCODED )
+ {
+ m_rRAS.ReadUChar( nRetVal );
+ return nRetVal;
+ }
+ else
+ {
+ if ( mnRepCount )
+ {
+ mnRepCount--;
+ return mnRepVal;
+ }
+ else
+ {
+ m_rRAS.ReadUChar( nRetVal );
+ if ( nRetVal != 0x80 )
+ return nRetVal;
+ m_rRAS.ReadUChar( nRetVal );
+ if ( nRetVal == 0 )
+ return 0x80;
+ mnRepCount = nRetVal ;
+ m_rRAS.ReadUChar( mnRepVal );
+ return mnRepVal;
+ }
+ }
+}
+
+//================== GraphicImport - the exported function ================
+
+bool ImportRasGraphic( SvStream & rStream, Graphic & rGraphic)
+{
+ bool bRet = false;
+
+ try
+ {
+ RASReader aRASReader(rStream);
+ bRet = aRASReader.ReadRAS(rGraphic );
+ }
+ catch (...)
+ {
+ }
+
+ return bRet;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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